Rotary spraying device



July 25, 1933.

E. G. MUNZ 1,919,244

ROTARY SPRAYING DEVICE v Filed May 26, 1930 INVENTOR v i/mer. #1012 BY WMmMJm Patented 1 July 25 1933 v NITED STATES; PATENT OFFICE], Q Q I Branne, Mom, or nnrnorrinrefiiaaii v Q i aornaY-"srnavme nnvronApplication mean at, 19301 Serial 1%. 455,568.

This invention relates, enerally to sprin wardly opening cupshapedportion 2 pro- I klersfor lawns and the li e and refers moreparticularly to those applicable to underground piping systems. i v a IOneof the essential objects of the invention is to provide a simple andcompact, rotary or revolving sprinklerhaving a radial discharge adaptedto cover the greatest possible area with a ninimum amount of waterAnother-object is to provide an efficient sprinkler in which all of theoperating parts are Within the sprinkler itself so that they are keptclean and lubricated by the Water and protected from dirt whenthey arein stalled in the ground as permanent fixtures. Another object is toprovide a sprinkler of the type describedin which the rotating body ornozzle of the sprinkler is hydraulically balanced and is rotated by thefriction of whirling liquid under pressure within the same. a a oAnother object is to provide a sprinkler in which the rotating body ornozzleisj pro vided with brakes rotation thereof. a I With the above andother objects; in view the invention consists of certain novelfe'atur'esof construction, combinations and arrangements of parts thatwill be hereinafter more fully described andparticularly pointed outinthe appended claims, a

In "the accompanying drawing:

Figure 1 is a vertical sectional View through asprinkler embodying myinvention and showing' the parts inoperative 'sprinkit A shaped portion20 is the base 20" of an inlingaposition;- i .7 Figure 2' is a viewsimilarlto Figure 1 showingthe parts ininactive position.

Figure 3'is a cross section on the line 33 ofFigure2-.. 'Figure 4; isacross-section on theline 4+4 of Figure2. a o H 'Re'ferring now to thedrawing,- A is the casing; B is the rotatable body or nozzle; C is thestem for the body;,and D and E respectively are brakes for the rotatablebody B of a sprinklerembodying my invention; As shown, the casing A hasa tubularportion 1 threaded upon the upper end of a water supply pipe Fin the ground and has anup that govern the'speed ot r I a f v 16 of thebodyand is provided with holes or I openings 17 thatincline upwardly lti 1 vided at its upper endwith a lateral flanged 3i-thatj issubstantially flush with the upper surfaceof the ground. The'bodyornozzle- B is supported axially. on the stem C and is i a movablelongitudinally of the ,cup-shape df portion 2 of'the casing. Preferablythebody 1 B issubstantially cylindrical in shapeand has abase 4; and'acover 5. As shown, the. a

base l has an axial opening 6 and isprovided upon diametrically oppositesides of said opening'with laterally opening slots '1 and v 8respectively. The cover 5 preferably has a flat top portion 9, a centraldepending'pon, tion 10, and a downwardly and outwardly inclined annularwall portion 11. The top 9 is adapted to seat in an annular recess 12 inthe flange 3 of the casing-and cooperate with vthe latter to enclose theother parts when the bodyis in loweredpo sition; the depending portion'10 has an axial socket 1a and a radial passage -15;and the wall portion11 constitutes the conneetion between the de' pending portion 10 andthecylindrical alls to the axis of the rotating body. l Theste'm G istubular in forni and extends through. the bases :18and {lrespectivelyofthe cupshaped portion 2 of the casing and ,ofthe' body B. Preferablythe stern is provided at its lower end with a nut 19 thatis engage Iable with the lower face 120 of the base,an d 1 is provided at itsupperend with a cupshaped portion 20f. Pressed within this cupvertedgT-shapedmember 21; As shown, an

' V annular shoulder 21 is provided at the bottom of vthecup-shapedportion 20' to space wa'rdly to'frictionally engage the innerwalls i ofthe cup-shapedportionf2 of'th'e casing';

In use the bodyB, stem" andnut 1 9 as V a unit are movable verticallywithin the cas-' loo g WVhen the water supply to the pipe F is turnedoii',the body B, stem C and nut v 19 are in lowered position within thecasing (see Figure 2), and the top 9 seats within the annular groove12'. However, when the water supply to the pipe F is turned on thewvater will rise in the. tubular part'of the If desired the interior ofthe'body B maybe casing 1 against the lower face of the nut 19 and willcause the nut 19, stem and body B to rise until thelnut .19 engages thelower face 20 of the cup-shaped base (Figure 1), whereupon water risingin the passage 23 will flow through the inclined passages 22 and will bedischarged in a whirling.

stream. into the body B. In this connection it willbe noted that theinclined passages 22 are larger .than the discharge openings 17,'hencethe body B'will' be filled with water under pressure and this bodyvofwhirling waterrotat'es the body B merely by friction.

providediwith blades or fins (not shown), but this is not necessary forsatisfactory 0pei'ation; As the body rotates the whirling 7 waterwill'be discharged throughthe open ings 17 andwill be thrown laterallyfrom the body over a large area. In fact, the con stru'ction andarrangement-of the body B and stem C is suchthat the entire velocity ofthe water is utilized for carrying the stream 7 from the body. Thus aminimum of water sprinklers cannot be used efiieiently or with willcover the greatest possible area. This is particularly desirablewhere'the water supply'is small and where ordinary underground outgreatly diminishing the water supply for other domestic purposes. In thepresent instance the body B must be freeto'move with very littlefriction.= This Therefore, there is no upward pressure against the bodyon the area of the bearing. This overcomes the lack of downwardpressureon the body due to'the bearing 6 through the base 4 of the body throughwhich the stem C extends. Consequently the body B is hydraulicallybalanced, but in order tomake it float its weight must be overcome, Thisis accomplished by making th e bearing 14 sun allor than the stem C sothat upward pressure on the body B is equal tothe downward pressure plusthe weight of the body, whereupon the body will float onthe stem G. i

It is desirable that the entire device be as small; in diameteraspossible and because of the small diameter the s'peed'would be great.-

the body will reach a wide radius.

However, it is also desirable to reduce the speed. as far as. possiblein order that the water discharging "from the opening 17 in In thisparticular construction the speed of the body B is reduced by thesegments D and Ewhich as the'body rotates are thrown outwardly bycentrifugal force against the walls of the cupshapedportion 2 and serveas brakes. The faster the body rotates the greater is the pressure ofthe segmentsD and E against the cupshaped portion 2; hence the brakingforce is greater. In this connection it will be apparent that thedesired braking effect may be obtained by, weights of differentconfiguration or by other means.

The sprinkler illustrated inthe accompanying drawing and described aboveis. primarily adapted for use in connectlon .witlr under-' ground pipingsystems; however7 ibmayabe adapted to a garden installation by tl1eelim-- 'ination of the casing A and by an arrangement to aflix the stemC directlyto the vertical piping, or it may beprovided with spike orsled supports for portable use-with a hose as the source ofwater-supply;

IVhat I claim as my invention is:

' 1. In a sprinkler, a. casing attachable toa water supply means, stemmovable longitudinally of the casing and havingan inverted substantiallyT-shaped head portion, anda rotatable body having a bearing inthe basethereof receiving the stem and having a.

bearing inthe top thereof receiving the stem oi. the T head portion,said top also having a radial passage constituting a vent for the lastmentioned-bearing, whereby any leakage past the said last mentionedbearing is immedately discharged to the atmosphere so that no pressurebuilds up above the stem of the Tiliead,

and said last mentioned bearing being smaller than the bearing in. thebase forthe stem so:

that upward. pressure on the body is equal to the downward pressure plusthe weight of the y. I I. a

2. In a sprinkler, a casing, a rotatable noz zle projectable from withinsaid casing, means for rotatingsaid nozzle and a' 'cens trifugal brakeoperativelyengaging-said casing and said nozzle when the latterisrotating in: projected position for limiting the speed of rotation.

In a sprinkler, ble in said casing, means for dischargingww ter intosaid rotatable nozzle in'a direction a casing, a .nozzlelrotata to exerta torque about the axis of said-nob zle, means for discharging the waterfrom saidnozzle radially thereofand meansfor relieving the hydraulicpressure on a'portion' of the upper surface of said'nozzlev whereby theupward pressure on said nozzle is just.

sufficiently greater than the downward; pres.

sure thereonto maintain a hydraulic balance permitting the freerotation" of *said nozzle and a centrifugal brake for limiting speed ofrotation of said nozzle.

4. In a sprinkler, a casing,a nozzle rotatably and axially movable withrespect to said casing, means operable by the; water pressure foraxially moving said nozzle,-means'for discharging Water into saidrotatably and axially movable nozzle in a direction to exert a torqueabout the axis of said nozzle, means for radially discharging the waterfrom said nozzle and means for relieving the the hydraulic pressure on aportion of the upper surface of said nozzle whereby the upward pressureon said nozzle is just sufliciently greater than the downward pressurethereon to maintain a hydraulic balance permitting the free rotation ofsaid nozzle and a centrifugal brake for-limiting the speed of rotationof said nozzle.

5. In a sprinkler, a llquid supplyconduit, a nozzle head rotatable andaxially movable relative to said supply conduit, means. for

vrotating said head, means for maintainingsaid nozzle head insubstantial hydraulic balance at the normal operating pressure of saidliquid supply'conduit, thereby obtaining low initial resistance torotation and means for retarding rotation of said nozzle headextendingwithin said nozzle head and adapted to discharge liquidthereinto in a manner I to cause rotation of the head by theinternalaction of theliquid. N

8. In a'sprinkler, a rotatably and axially movable nozzle head, a liquidsupply con-f duit extending within said nozzleflhead and meansassociated with said liquid supply conduit and within said head fordischarging liquid in a direction to cause said head to be rotated byinternal action of the liquid.

9. In a sprinkler,afixed body, ahead supported on said body for rotationand axial movement with respectthereto, and means within said head fordischarging liquid in a direction to exert a torque within said headwhereby a rotary motion is obtained within i said head capable ofrotating said head, and] r means for discharging the llquid from said 1V head'ina direction to project a maximum distance therefrom. v

-10. In a sprinkler, a rotatably and axially movablenozzle head, aliquid supply conduit extending within said nozzlehead and adapt ed todischarge liquid thereinto in a direc-' tion to cause a rotation withinsaid nozzle head byintern al action, and means cooperat ing with saidnozzle head to-producea rota tion of'said head at a substantially slowerspeed than said internal rotation.

. I 11. In a sprinkler, a rotatable nozzle head, a liquid supply conduitextending withinsaid nozzle head, means for maintaining said head insubstantial hydraulic balance at the normal operatingpressure of saidliquid supply conduit, and meansassociated with said supply conduit andwithin said nozzle head'for discharging the liquid from said supplyconaduit into said nozzle head in-a direction to V 1 cause said head to berotated by internalaction of the liquid.

ELMER G. MUNZ. f

